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(Model.) 2 Sheets-Sheet l.

H. HOLDEN & R. G. BROOKE.

INJEGTOR.

No. 419,124. Patented Jan. 7, 1890.

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(Model.) C 2 sheets-sheet 2;

H. HOLDEN 8v R. G. BROOKE.

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10.419,124. Patented Jan. 7.1890.

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UNITED STATES PATENT OFFICE.

HARRY HOLDEN AND ROBERT GRUNDY BROOKE, oF SALFORD, COUNTY OF LANCASTER, AssiGNoRs To GEORGE FREDERIOK GLASS HOOPER, OF

VESTMINSTER, ENGLAND.

INJECTOR.

SPECIFICATION forming part of Letters Patent No. 419,124, dated January 7, 1890.

Application iiled June 17, 1887. Serial No. 241,670. (Model.) Patented in England February l1, 1887, No. 2,177; in France May 10, 1887, No. 183,484; in Belgium May 11, 1887, No. 77,411; in Germany May 17, 1887, No. 41,191; in Italy July 1887',XL11I, 98; in Canada July 26, 1887, No. 27,268, and in Austria-Hungary September 25. 1887, No. 20,076.

To all whom t may concern:

Be it known that we, HARRY I'IOLDEN and ROBERT GRUNDY BROOKE, subjects of the Queen of Great Britain and Ireland, both re- 5 siding at Salford, in the county of Lancaster, Kingdom of Great Britain and Ireland, have invented Improvements in Injectors, of which the following is a specification, and which has been patented to us as follows: Great 1o Brit-ain, No. 2,177, dated February 11, 1887; Germany, No. 41,191, dated May 17, 1887; Austria-Hungary, No. 20,076, dated September 25, 1887; France, No. 183,484, dated May 10, 1887; Belgium, No. 77,411, dated May 1l,

1887; Italy, July 5,1887, Reg. Att. Vol. XLIII, No. 98, and Canada, No. 27,268, dated July 26, 1887.

This invention relates to injectors in which both exhaust or low-pressure steam and high- 2o pressure or live steam are used to impart ve-' locity to water. It has reference particularly to apparatus in which both exhaust or lowpressure Steam and high-pressure or live steam are used to project the water, the arrange- 2 5 ment as we usually carry it out being such that a jet of water produced by exhaust or low-pressuresteam hassubsequentlyimparted to it an increased velocity and consequent penetrating power by high-pressure or live 3o steam.

The object of our invention is to renderthe apparatus automatic both as regards starting and stopping, utilizing the pressure of water produced by the action of the exhaust or low 3 5 pressure steam for the purpose of automatically admitting higlrpressure or live steam to mix and forni a combined jet with such water for the purpose of increasing its velocity.

The invention can be carried out in various for1nstliat is to say, the exhaust or lowpressure injector and the high-pressure or live-steam injector may be combined in one instrument, forming a compound injector, or they may be separateinstruments, the exhaust 4 5 orlow-pressure injector (which we will call the eXliaust-injector) being of any desired or suitable construction and the high-pressure or live-steam injector being a separate instrument, which we will call a supplementaryin- 5o jector, designed to be attached to orconnected with the exhaust-injector.

For convenience of description we select the latter type as and byway of illustration in describing the nature and practical appli` cation of our invention.

Referring to the accompanying drawings, Figure 1 is a central longitudinal section ot' a supplementary injector according to this invention. Fig. 2 is a cross-section of the same in the line A B of Fig. 1. Fig. 3 is a plan, and Fig. 4 is a section in the line C D of Fig. 3. Fig. 5 is a central. longitudinal section of a supplementary injector according to this invention and an exhaust-injector.

This `supplementary injector iS designed to be applied to an exhaust-injector, as shown in Fig. but the exhaust-injector may be of any other suitableconstruction.

By an exhaust-injector we mean one that 7o imparts velocity to water for feeding aboiler, or for other purposes, by means of steam at or near atmospheric pressure-suoh, for examvfrom an exhaust-injecto13 (as hereinabove deiined,) and which is so constructed as to cause the water so received to combine with a jet of high-pressure or live steam, whereby there is imparted to the water greater velocity and consequent penetrating poiver than would be given to it by the action of the exhaustl or low-pressure steam alone.

lis the casing of the supplementary injector. 2 is the water-nozzle; 3, the combining-nozzle; 4, the overflow, and the delivery-nozzle. The Water entering under pressure from the exhaust-injectorcan only escape eitherinto the boiler or out at the overflow l and cock G. The jet of Water produced by exhaust or low-pressure steam in the injector a enters the supplementary injector down the passage d and the area of the nozzles or cones 2 and 3, as usually employed, is suiliciently small to cause a considerable pressure in the nozzle 2.

Now, our invention has for its object to render the apparatus automatic both as regards starting and stopping. To this end \ve utilize the pressure ot' Water produced by the action of the exhaust or low-pressure steam (in the injector a) for the purpose of automatically admitting high pressure or live steam to mix and form a combined jet with such Water for the purpose of increasing its velocity. This pressure actuates the diaphragm '7 and valve S, or instead of a diaphragm a piston may be used, as shown in Fig. 5, if the chamber in which the diaphragm is shown be made cylindrical and ot' suitable proportions.

t) is a passage by which pressure reaches the diaphragm. lYhen the pressure acting on the diaphragm is su'iicient to open the valve 8, live steam enters at l0 and passes dovvn the passage l0 into the area ll around the waternozzle.

12 is a ring, of metal or other suitable 1natcrial,carried by the diaphragm and surrounding the guide-pin 13,\vl1icl1islixed to the diaphragm and enters a recess in the piston ll at the lower end of the stem ot' the valve S. The ring 12 serves to limit the motion of the diaphragm, and also as a valve to prevent steam passing the piston ll by seating itself against a faced surface l5.

1G is a leak-hole to prevent accumulation ot pressure on top of the diaphragm in case of any leakage past the ring l2.

1T is the overfiow chamber and passage connected with the cock G.

1S is a valve Weighted, as required, by an adjustable spring l).

The valve S may or may notbe provided with a spring, according to circumstances. It is shown provided ivith a spring 20. ll'hen the exhaustinjector a starts, a pressure of Water accumulates in the passage 0, space 2l, (below the diaphragm or pistom) nozzle 2, and combining-nozzle 3, sufficient to lift the diaphragm (or piston) against the pressure ot live steam (and of the spring 20, if used) on valve 8. Thus valve S is opened and live steam mingles with the Water-jet and gives the required additional velocity. It the exw haust-injector stops, the pressure under the diaphragm (or piston) ceases, and so valve 8 closes and live steam is shut ott.

lt is to be remarked that though We have illustrated arrangements that will be found to Work Well, we do not bind ourselves to any of the precise details shown, as the same are capable oi' variation. Thus the diaphragm may be made of any suitable material or combination of materials such as will have sui'iicient strength and pliability.

le are aivare it has before been proposed to use a supplementary injector Worked by hi gli-pressure or live steam; but the method of starting and Working such a combination of exhaust and supplementary injectors, as heretofore usually practiced, has been so complicated as to interfere with their utility. No\v,t'rom the description hereinabove given of our invention, it will be understood that ive simplify and render automatic the working and starting of the supplementary injector by arranging the same so that vvhen the exhaust-injector is at Work and is delivering Water into the supplementary injector higl1- pressure steam will be automatically admitted instead of, as heretofore, by hand, so as to combine with the incoming Water and to force it against the higher pressure it is required to work against; and moreover the high-pressure or live steam will be automatically shut ott' from the supplementary injector as and when required, so as to automatically prevent its blowing back through the injector, as it would do il not shut olf directly on the exhaust-injector ceasing to Work.

The matter herein claimed may be found, but not claimed, in our pending application, Serial No. 248,403.

\Vhat We claim is-m l. An injector comprising a passage for high-pressure or live steam, a valve controlling said passage, and means whereby press ure arisiu g from a Water-j et produced by exhaust or low-pressure steam will cause said valve to open and admit the live or higher pressure steam to said jet for the purpose of increasing the velocity thereof and so enabling said jet to exert a greater pressure than that due to the velocity caused by the exhaust or low-pressure steam alone.

ln an injector, the combination of a casing provided with a pressure-chamber and with a passage for high-pressure or live steam, a nozzle or passage communicating with said chamber and along which a Waterjet produced by exhaust or loW- pressure steam is caused to flow, a valve S, adapted to control the flow ol high-pressureor live steam through said passage, and a diaphragm 7, (or pistom) located Within said pressure-chamber and arranged to actuate said valve when subjected to unequal pressure on its opposite ends, for the purpose specified.

IOO

o. Theinjeetor hereinabove described, eom- In testimony whereof We have signed our pmsing casing l, Water-nozzle 2, combiningnames to this specoatlon in the presence of nozzle 3, overflow 4, delivery-nozzle 5, cook 6, two subscribing Witnesses.

diaplnagn'l 7 (or piston) and its oontainng- HARRY HOLDEN. t 5 chamber, valve S, passage 9, passage lO, pas- ROBERT GRUNDY BROOKE.

sage l0, area 11, leak-hole 1U, to prevent ao- Witnesses: eunlulation of pressure on the top of the dia- ROBERT VARDLE, phrag'xn or piston, oVerow-ehamber 17, and ROBT. TOMLINSON,

weighted valve 18, substantially as described, Both of'56 Brown Street, llcmcheser, Gen- 10 for the purpose specified. tlemefn. f 

